As stated in the topic, I would like to install the dovecot imapserver, and enable web-access via the roundcube-client.
To heighten security when logging in from unsecure machines, I would like to login via One Time Passwords (e.g. OPIE).
Would that be possible?
Does anyone have experience implementing such a feature into to a webmail client?

2 Answers
2

This tutorial is a bit old, but should a good guide whatever two-factor auth system you choose. To get two-factor authentication working on linux, your best bet is to go through PAM. Point PAM to your two-factor auth server via pam-radius, pam-ldap etc.